Nanostructure material, method for the preparation thereof

Details Nanostructure material, method for the preparation thereof Nanostructure material, method for the preparation thereof

2005-10-18

2010-06-29

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

C423S265000, C423S274000, C423S414000, C428S368000, 72, C977S773000, C977S811000

Reexamination Certificate

active

07744835

ABSTRACT:
The invention relates to a nanostructured material.The material is a nanostructured carbonaceous material composed of agglomerates of small needles of Li1+αV3O8and of β-LixV2O5(0.1≦α≦0.25 and 0.03≦x≦0.667) surrounded by a noncontinuous layer of spherical carbon particles.It is obtained by a process consisting in preparing a carbonaceous precursor gel by bringing carbon, α-V2O5and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 1.15 and 1.5 and that the (carbon)/(carbon+V2O5+Li precursor) ratio by weight is from 10 to 15 and in subjecting the gel to a heat treatment comprising a 1st stage at 80° C.-150° C. for 3-12 h and a 2nd stage between 300° C. and 350° C. for 10 min to 1 hour, under an nitrogen or argon atmosphere.Applications: positive electrode active material.

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Pistoia et al., “Li/Li1+xV3O8Secondary Batteries Synthesis and Characterization of an Amorphous Form of the Cathode”, Journal of the Electrochemical Society 137 Aug. 1990, No. 8, pp. 2365-2370 Manchester, NH, US, XP 000231200.
International Search Report dated Sep. 28, 2006 (three (3) pages).

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